{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-123119", "assignerOrgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "state": "PUBLISHED", "assignerShortName": "Checkmarx", "dateReserved": "2026-11-05T12:32:19.431Z", "datePublished": "2026-11-05T12:57:35.267Z", "dateUpdated": "2026-11-05T12:57:35.267Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "shortName": "Checkmarx", "dateUpdated": "2026-11-05T12:57:35.267Z"}, "title": "Symfony: NoPrivateNetworkHttpClient Does Not Pin the Checked IP of Cached Hosts, Letting DNS Rebinding Enumerate Internal Ports (Incomplete Fix for CVE-2024-50342)", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-367", "description": "CWE-367 Time-of-check time-of-use (TOCTOU) race condition", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-918", "description": "CWE-918 Server-Side request forgery (SSRF)", "type": "CWE"}]}], "affected": [{"vendor": "sensiolabs", "product": "symfony", "collectionURL": "https://packagist.org/packages/symfony/http-client", "packageName": "symfony/http-client", "repo": "https://github.com/symfony/http-client", "modules": ["Symfony\\Component\\HttpClient\\NoPrivateNetworkHttpClient"], "versions": [{"status": "affected", "version": "0", "lessThan": "5.4.56", "versionType": "git"}, {"status": "affected", "version": "6.0.0", "lessThan": "6.4.50", "versionType": "git"}, {"status": "affected", "version": "7.0.0", "lessThan": "7.4.23", "versionType": "git"}, {"status": "affected", "version": "8.0.0", "lessThan": "8.1.11", "versionType": "git"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "The Symfony HttpClient component\u00a0NoPrivateNetworkHttpClient\u00a0does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.\n\nNoPrivateNetworkHttpClient resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the\u00a0resolve option so that the client connects to the exact IP that was checked. The issue is that\u00a0resolve was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.\n\nAn attacker who controls a host's DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the\u00a0primary_ip\u00a0in the\u00a0on_progress\u00a0callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div>The Symfony HttpClient component&nbsp;<code>NoPrivateNetworkHttpClient</code>&nbsp;does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.</div><div><code>NoPrivateNetworkHttpClient</code> resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the&nbsp;<code>resolve</code> option so that the client connects to the exact IP that was checked. The issue is that&nbsp;<code>resolve</code><span> was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.</span></div><div>An attacker who controls a host's DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the&nbsp;<code>primary_ip</code>&nbsp;in the&nbsp;<code>on_progress</code>&nbsp;callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342.</div>"}]}], "references": [{"url": "https://github.com/symfony/symfony/security/advisories/GHSA-c7hm-wqwp-f9v8", "tags": ["third-party-advisory"]}, {"url": "https://github.com/symfony/symfony/commit/ab084826b2b5db8d0b91af635fe2b5e1c4f699f9", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "LOW", "baseScore": 2.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N"}}], "credits": [{"lang": "en", "value": "Eirik Stanghelle Morland from Packagist", "type": "reporter"}, {"lang": "en", "value": "Nicolas Grekas", "type": "remediation developer"}], "source": {"advisory": "GHSA-c7hm-wqwp-f9v8", "discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

{}

{"affected": [{"affectedData": [{"collectionURL": "https://packagist.org/packages/symfony/http-client", "defaultStatus": "unaffected", "modules": ["Symfony\\Component\\HttpClient\\NoPrivateNetworkHttpClient"], "packageName": "symfony/http-client", "product": "symfony", "repo": "https://github.com/symfony/http-client", "vendor": "sensiolabs", "versions": [{"lessThan": "5.4.56", "status": "affected", "version": "0", "versionType": "git"}, {"lessThan": "6.4.50", "status": "affected", "version": "6.0.0", "versionType": "git"}, {"lessThan": "7.4.23", "status": "affected", "version": "7.0.0", "versionType": "git"}, {"lessThan": "8.1.11", "status": "affected", "version": "8.0.0", "versionType": "git"}]}], "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Symfony HttpClient component\u00a0NoPrivateNetworkHttpClient\u00a0does not pin the checked IP address of cached hosts, allowing for DNS rebinding to bypass private network restrictions, resulting in enumeration of internal hosts and ports in Symfony versions prior to 5.4.56, 6.x prior to 6.4.50, 7.x prior to 7.4.23, and 8.x prior to 8.1.11.\n\nNoPrivateNetworkHttpClient resolves the host of each request and checks the IP before connecting. It caches the result per host, and passes the IP to the decorated client through the\u00a0resolve option so that the client connects to the exact IP that was checked. The issue is that\u00a0resolve was only passed on the first lookup of a host: on subsequent requests, the decorated client resolved the host again on its own.\n\nAn attacker who controls a host's DNS can exploit this with DNS rebinding by answering the first lookup with a public IP, and subsequent lookups with a private IP, so when an application sends several requests to that host through the same client, the later requests connect to the private IP. This happens, for example, when an application fetches several URLs of a repository provided by a user. The check of the\u00a0primary_ip\u00a0in the\u00a0on_progress\u00a0callback still aborts the request before anything is sent, but the connection is made, and the error differs depending on whether the port is open or closed. This allows enumerating internal hosts and ports, as in CVE-2024-50342."}], "id": "CVE-2026-123119", "lastModified": "2026-11-05T13:17:07.640", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.3, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "type": "Secondary"}]}, "published": "2026-11-05T13:17:07.640", "references": [{"source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "url": "https://github.com/symfony/symfony/commit/ab084826b2b5db8d0b91af635fe2b5e1c4f699f9"}, {"source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "url": "https://github.com/symfony/symfony/security/advisories/GHSA-c7hm-wqwp-f9v8"}], "sourceIdentifier": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-367"}, {"lang": "en", "value": "CWE-918"}], "source": "596c5446-0ce5-4ba2-aa66-48b3b757a647", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,5.4.56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.0.0,6.4.50)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.0,7.4.23)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[8.0.0,8.1.11)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "symfony", "source": "cna", "vendor": "sensiolabs"}, "product": "symfony", "vendor": "sensiolabs"}], "created": "2026-11-05T14:45:15.070054+00:00", "updated": "2026-11-05T16:00:18.044756+00:00", "vendors": ["sensiolabs", "sensiolabs$PRODUCT$symfony"]}